The initial idioms of the letter U

up an’ at ’em	up and
up and about	up and around
up and at 'em	up and at them
up and away	up-and-comer
up and coming	up and did
up and down	up and running
up close and personal	up for
up for grabs	up for something
up front	up (one's) alley
up (one's) sleeve	up high
up in arms	up in someone’s gold ones
up in the air	up in the air about someone/something
up in years	up North
up on	up on (one's) ear
up on someone’s bumper	up on something, be